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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9aed10e546c5fe17bcc2582ff64580d94a60e6a34f013438664897004405fdaf' 
  AND token = 'SD1XALHugJG5eIrHnbji9L/HjUu1Kd2ZuiaEbPP8KNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}